From a9f9de7378e3a81f7266f542f2290399a298ef52 Mon Sep 17 00:00:00 2001
From: Mark Maule <maule@sgi.com>
Date: Tue, 26 Apr 2005 08:01:00 -0700
Subject: [PATCH] [IA64-SGI] altix: enable vgacon support
Altix patch to enable use of vgacon driver on that platform. Depends on the
PCDP generalization patch discussed at:
http://marc.theaimsgroup.com/?l=linux-ia64&m=111446235101939&w=2
Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
arch/ia64/configs/sn2_defconfig | 4 ++--
arch/ia64/sn/kernel/iomv.c | 6 ++++++
arch/ia64/sn/kernel/setup.c | 16 ++++++++++------
3 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/ia64/configs/sn2_defconfig b/arch/ia64/configs/sn2_defconfig
index 487d2e36b0a6d..c05613980300c 100644
--- a/arch/ia64/configs/sn2_defconfig
+++ b/arch/ia64/configs/sn2_defconfig
@@ -99,7 +99,7 @@ CONFIG_ACPI_DEALLOCATE_IRQ=y
# Firmware Drivers
#
CONFIG_EFI_VARS=y
-# CONFIG_EFI_PCDP is not set
+CONFIG_EFI_PCDP=y
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_MISC is not set
@@ -650,7 +650,7 @@ CONFIG_MMTIMER=y
#
# Console display driver support
#
-# CONFIG_VGA_CONSOLE is not set
+CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
#
diff --git a/arch/ia64/sn/kernel/iomv.c b/arch/ia64/sn/kernel/iomv.c
index fec6d8b8237b7..7ce3cdad627bf 100644
--- a/arch/ia64/sn/kernel/iomv.c
+++ b/arch/ia64/sn/kernel/iomv.c
@@ -9,12 +9,16 @@
#include <linux/module.h>
#include <asm/io.h>
#include <asm/delay.h>
+#include <asm/vga.h>
#include <asm/sn/nodepda.h>
#include <asm/sn/simulator.h>
#include <asm/sn/pda.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/shub_mmr.h>
+#define IS_LEGACY_VGA_IOPORT(p) \
+ (((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
+
/**
* sn_io_addr - convert an in/out port to an i/o address
* @port: port to convert
@@ -26,6 +30,8 @@
void *sn_io_addr(unsigned long port)
{
if (!IS_RUNNING_ON_SIMULATOR()) {
+ if (IS_LEGACY_VGA_IOPORT(port))
+ port += vga_console_iobase;
/* On sn2, legacy I/O ports don't point at anything */
if (port < (64 * 1024))
return NULL;
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 44bfc7f318cbd..3e5ba34ac2efb 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -36,6 +36,7 @@
#include <asm/machvec.h>
#include <asm/system.h>
#include <asm/processor.h>
+#include <asm/vga.h>
#include <asm/sn/arch.h>
#include <asm/sn/addrs.h>
#include <asm/sn/pda.h>
@@ -273,14 +274,17 @@ void __init sn_setup(char **cmdline_p)
ia64_sn_plat_set_error_handling_features();
+#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
/*
- * If the generic code has enabled vga console support - lets
- * get rid of it again. This is a kludge for the fact that ACPI
- * currtently has no way of informing us if legacy VGA is available
- * or not.
+ * If there was a primary vga adapter identified through the
+ * EFI PCDP table, make it the preferred console. Otherwise
+ * zero out conswitchp.
*/
-#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
- if (conswitchp == &vga_con) {
+
+ if (vga_console_membase) {
+ /* usable vga ... make tty0 the preferred default console */
+ add_preferred_console("tty", 0, NULL);
+ } else {
printk(KERN_DEBUG "SGI: Disabling VGA console\n");
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;